Recent content by jdonn987

  1. J

    Help with a dynamics homework problem

    thanks so much for all your help - you've been a lifesaver
  2. J

    Help with a dynamics homework problem

    from asking my teacher about this problem, he said that the the shape of BC doesn't matter in the whole scheme of the problem. you can assume that BC is a slender rod, and use the mass moment of inertia for it (1/12)mL^2, and use the angular acceleration for BC that is found from part B, with L...
  3. J

    Help with a dynamics homework problem

    i think i need more help with the second part of this question, because I've tried solving it a few different ways, and the answers that I'm getting aren't working out. I've tried saying that AB is a vector, CD is a vector, and that piece BC is essentially r_{C/B}, and trying to solve for...
  4. J

    Help with a dynamics homework problem

    from what understand about this problem so far, I'm trying to use that equation for rigid body motion stating with the given \alpha_{AB} . as for the second part, I'm not sure if BC is rotating or translating, but I'm leaning more towards translating since its perpendicular to AB at this...
  5. J

    Help with a dynamics homework problem

    that was a typo in the original problem; the initial velocity is instantaneous, while the acceleration is constant, so at that instant, it is rotating at .5 rad/s, but slowing down because of the negative acceleration
  6. J

    Help with a dynamics homework problem

    so for part a do i disregard the forces that BC and CD put on AB that would counter its own motion? thanks for the reply...i've been working on this problem for a few hours now and I'm still not really getting anywhere
  7. J

    Help with a dynamics homework problem

    i was wondering if anyone could help me with this problem i got for homework. I'm not completely sure where to start with this, so any advice is appreciated. the closest problem I've done with this is just finding the angular velocities and accelerations of the other rods, and i don't know if...
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